When one is masturbated by another as the other individual works ones arm while the individual has their hand at their privates.
Guy grabs junk, girl grabs guy's arm and moves his arm for him. Girl is causing the motion, guy is benefiting. Almost as a sexual "Stop hitting yourself."
A dutch rutter is where you, yourself grab your penis after obtaining an erection. A male or female then grabs your hand.... While still holding your cock. That person then begins to move your arm in a motion for you. Thus jerking you off. But without touching your cock. There is also a double dutch rutter... where obviously to homosexuals or just friends do it.
When two men are preforming the act of a double dutch rudder, while standing by a shelf or similar apparatus and using their own belts to also preform Auto erotic asphyxiation. However if one participant passes out before the others completion it them becomes a Deadmans hand dutch rutter.